In my opinion, this is not an economical way to get more water; ____, it is very expensive.
— We didn’t find the Blacks _____ the lecture. — No one had told him about ____ a lecture the following day.
After the long journey, the Smiths returned home, ____.
— Which of those electronic dictionaries do you like most? — ____. They are both expensive and of little use.
English is a language that many people around the world ____ not speak perfectly but ____ at least understand.
.— Excuse me, could you tell me where I could make a call? — Sorry, I’m a stranger here. — ____.